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Method for modified production of viscose fibers by natural-color reed paper pulp

A viscose fiber and pulp technology, applied in pulp bleaching, pulping with inorganic alkali, fiber raw material treatment, etc., can solve the problems of high iron and ash content of natural reed pulp, unsatisfactory natural reed pulp, high dust of natural reed pulp, etc. , to achieve the effect of improving fiber response performance, avoiding damage, and reducing dust content

Active Publication Date: 2020-03-17
XINJIANG FULIDA FIBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for producing viscose fiber by modifying the natural color reed pulp, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems of low whiteness and natural color of the natural color reed pulp existing in the viscose fiber production technology. The lower fiber content of reed pulp, the higher iron and ash content of natural reed pulp, and the higher dust content of natural reed pulp lead to the problem that natural reed pulp cannot meet the quality index requirements of pulp for viscose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The method for producing viscose fiber by modifying the natural color pulp of reed is carried out according to the following method: First, the natural color reed pulp is alkali impregnated by continuous alkali impregnation, step thickening, and countercurrent alkali return; Second, the two-stage squeezer series displacement washing method and the first-stage mesh belt washing machine five-stage countercurrent washing method are used to wash away the residual alkali remaining in the slurry; third, the use of the disc mill machinery The force and the friction between the fibers will remove the pulp in the form of film or fragments, so that S 2 The fine fibers in the layer are separated to achieve sufficient swelling and fibrillation; fourth, when the first stage of bleaching of the pulp is carried out in the bleaching tower using the chemical properties of hydrogen peroxide, after a stage of bleaching, it enters the bleaching and depolymerization In the tank, th...

Embodiment 2

[0027] Embodiment 2: As an optimization of the above embodiment, the continuous alkali impregnation includes one-stage impregnation, two-stage impregnation, three-stage impregnation and four-stage impregnation.

Embodiment 3

[0028] Example 3: As an optimization of the above example, the concentration of liquid caustic soda used in the primary dipping is 70g / L to 90g / L, the concentration of liquid caustic used in the secondary dipping is 50g / L to 70g / L, and the concentration of liquid caustic soda is used in the third stage dipping. The concentration of liquid caustic soda is 30g / L to 50g / L, and the concentration of liquid caustic soda is 10g / L to 30g / L.

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PUM

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Abstract

The invention relates to the technical field of viscose fiber production, and in particular, relates to a method for modified production of viscose fibers by natural-color reed paper pulp, wherein themethod comprises the steps: performing alkali impregnation on the natural-color reed paper pulp by adopting continuous alkali impregnation, gradient concentration and countercurrent alkali return; washing and removing by a two-stage pulp extruder series replacement washing mode and a one-stage mesh belt type pulp washer five-section countercurrent washing mode; removing film-shaped or fragment paper pulp by utilizing the mechanical acting force of a disc mill; carrying out first-stage bleaching and second-stage bleaching polymerization reduction treatment on the pulp; and cleaning and replacing by a countercurrent washing mode. According to the method, the alpha-cellulose content of the reed pulp is improved to the greatest extent, the requirement of viscose production on the alpha-cellulose content of the pulp raw material is met, the next bleaching polymerization reduction effect and the fiber reaction performance of the natural-color reed paper pulp are improved, the dust content of a final product is reduced, the damage to alpha-cellulose is avoided to the maximum extent, the alpha-cellulose content is improved, and meanwhile, silicon is prevented from entering a viscose production system.

Description

Technical field [0001] The invention relates to the technical field of viscose fiber production, and is a method for producing viscose fiber by modifying reed natural color pulp. Background technique [0002] In recent years, with the technological innovation of my country's textile industry and the technological progress of viscose industry, the demand for viscose fiber in the textile field has gradually increased. As my country has become the world's largest producer of viscose fiber, viscose fiber has become One of the main raw materials of textile fibers. The vigorous development of the viscose industry will inevitably continue to increase the demand for upstream product pulp. At present, the traditional domestic wood pulp, bamboo pulp, cotton pulp, etc., due to the limitation of raw material resources, the total output still cannot meet my country's viscose fiber The production demand of the industry still needs a large amount of imports every year. Therefore, vigorously exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C9/02D21C9/10D21C9/16
CPCD21C3/02D21C9/02D21C9/10D21C9/163
Inventor 冯文军盛宁孙立奎王小波王琦郭新武王桂林
Owner XINJIANG FULIDA FIBER CO LTD
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